Siemens 6ES7953-8LM31-0AA0 S7-300 Micro Memory Card

The Siemens 6ES7953-8LM31-0AA0 Micro Memory Card provides reliable program and data storage for SIMATIC S7-300 PLC systems. This 4 MB Flash-EPROM card stores the user program and system data for S7-300, C7, and ET 200 controllers . It ensures that your automation system retains its program even during power outages.

Technical Specifications of Siemens 6ES7953-8LM31-0AA0

The Siemens 6ES7953-8LM31-0AA0 Micro Memory Card uses a 3.3 V Nflash memory technology for dependable operation . It offers a capacity of 4 Mbytes, providing ample space for most S7-300 applications . The card supports a minimum of 100,000 write/delete cycles, ensuring long-lasting performance . It retains data for at least 10 years after the final programming action . The card’s compact dimensions include a width of 24 mm, a height of 32 mm, and a depth of 1.4 mm . It weighs approximately 2 g . This card is a spare part for existing S7-300 systems and has a successor model 6ES7953-8LM32-0AA0 .

Parameter	Specification
Model Number	Siemens 6ES7953-8LM31-0AA0
Product Type	Micro Memory Card
Product Family	SIMATIC S7-300 / C7 / ET 200
Memory Type	Flash-EPROM (Nflash)
Memory Size	4 Mbyte
Write/Delete Cycles	100,000 minimum
Data Retention	10 years minimum
Voltage	3.3 V
Width	24 mm
Height	32 mm
Depth	1.4 mm
Weight	Approx. 2 g
Product Phase	Phase-Out (successor: 6ES7953-8LM32-0AA0)

Integration and Application

The Siemens 6ES7953-8LM31-0AA0 Micro Memory Card inserts directly into the S7-300 CPU’s MMC slot. It stores the user program, configuration data, and system parameters . This card acts as the load memory for the S7-300 system. You can use this card as a spare part or replacement for existing installations .